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Definition of open-pit in English:

open-pit

adjective

Denoting a method of mining in which coal or ore is extracted at or from a level near the earth's surface, rather than from underground workings.

‘The Galactic Mining Company, Vancouver, British Columbia, had secured a permit for a massive expansion of its open-pit mine which would gobble up the quarry.’

‘The firms were part of a large group of mining firms operating in protected forests that froze their operations following the enactment of new forestry legislation in 1999, which banned open-pit mining in those areas.’

‘Additional drilling at the site of the proposed open-pit mine allowed the company to increase its estimates to roughly 26 tons of gold, it said in a statement.’

‘The Marquette iron range, which has hosted more than 240 mines since its beginning in 1845, now features only two open-pit taconite mines.’

‘The Western Shoshone, whose traditional domain covers most of Nevada, are the unhappy hosts to more than three dozen open-pit gold mines on their land, many at least a mile wide and a mile deep, with toxic ponds at the bottom.’

‘GPS also is being used in another important safety-of-life service: monitoring the stability of landforms such as open-pit mines, the flanks of dormant volcanoes, and areas prone to landslides.’

‘Toronto council votes to send 1.3-million tonnes of garbage to an abandoned open-pit mine near Kirkland Lake in Ontario's north, population 10,000.’

‘It requires no open-pit mines, and the task of keeping the public from seeing the true environmental costs of methane, and what a meager source of energy it is, has gone pretty well so far.’

‘When scientists hunt for dinosaur tracks they look for areas where ancient layers of sedimentary rock are exposed, such as cliffs, sea coasts, quarries, open-pit mines, desert arroyos, and along the banks of rivers and streams.’

‘Chicago-based Oil-Dri Corporation of America, the world's largest producer of cat litter, has been fighting for several years to develop two open-pit clay mines on Bureau of Land Management property ten miles north of downtown Reno.’

‘The Trend's first open-pit mine came in 1965, but it was the steep rise of gold prices in the 1980s and the introduction of cyanide heap-leaching that made mining such low-grade ore profitable.’

‘This ‘up-scaling’ is generally accommodated easily in open-pit mines, but in underground workings the creation of large caverns brings with it problems of rock mechanics and increased risk of instability.’

‘Production peaked here about the turn of the century but continued into the 1970s; after a short lapse it has resumed with open-pit mining of low-grade ores.’

‘This was very exciting because I knew that if an open-pit mine was developed in this district, tremendous new exposures would be made and wonderful specimens of crystallized gold might begin to appear.’

‘In an effort to convert copper rock into quick cash, he tried to open-pit mine the lode to extract ore as fast as possible.’

‘Between 48 and 116 people will be needed for three years to work on open-pit mining, while another 48 people will work for two years in underground mining.’

‘The firms were part of a large group of mining companies forced to suspend operations following the enactment of a new forestry law in 1999 that banned open-pit mining in protected areas.’

‘But the construction of the world's largest open-pit mine resulted in the displacement of people as land, including farms, was grabbed from the local population.’

‘The copper and molybdenum open-pit mine started operating in 1957 and is 2 mi. across from east to west and 1.5 mi. across from north to south.’

‘By adding lands formerly administered by the Bureau of Land Management, the California Desert Protection Act expanded the boundary of Joshua Tree National Park toward the rim of an inactive open-pit iron mine.’